Sigma Scientific Glass Pvt. Ltd manufactures Vent Valves. Sigma Scientific Glass Pvt. Ltd is an ISO 9001:2000 certified company. Vent Valves are used in chemical, pharmaceutical, dyes and allied industries. These are made of borosilicate glass 3.3 and PTFE or PFA, which ensures maximum resistance to corrosion. Its glass body provides visual monitoring of valve operation. These Vent Valves are ideal for venting plants operating under vacuum, atmospheric pressure or at low positive pressure [up to 0.5 bar Hg].
